A simple magnifier makes an image appear at the near point distance from the eye of the viewer (25 cm). What is the magnifying power of the magnifier if it is constructed of a lens of focal length of 6.3 cm? Do not use the approximation formula
a. 5.0
c. 1.2
b. 50
d. 7.3
A
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The tension in each of two strings is adjusted so that both vibrate at exactly 819 Hz. The tension in one of the strings is then increased slightly. As a result, six beats per second are heard when both strings vibrate
What is the new frequency of the string that was tightened? A) 825 Hz B) 813 Hz C) 822 Hz D) 816 Hz
A projectile is fired over a horizontal surface at an angle of elevation of 70°. Neglecting air resistance, what are possible angles in flight between the acceleration vector and the velocity vector?
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